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Re: [PATCH] x86/cpuid-policy: Add AMD SVM CPUID leaf to featureset
- To: George Dunlap <george.dunlap@xxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 22 Apr 2024 17:14:18 +0200
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monne <roger.pau@xxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Mon, 22 Apr 2024 15:14:24 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 22.04.2024 17:09, Jan Beulich wrote:
> On 17.04.2024 15:22, George Dunlap wrote:
>> --- a/xen/arch/x86/cpu/common.c
>> +++ b/xen/arch/x86/cpu/common.c
>> @@ -477,6 +477,8 @@ static void generic_identify(struct cpuinfo_x86 *c)
>> c->x86_capability[FEATURESET_e7d] = cpuid_edx(0x80000007);
>> if (c->extended_cpuid_level >= 0x80000008)
>> c->x86_capability[FEATURESET_e8b] = cpuid_ebx(0x80000008);
>> + if (c->extended_cpuid_level >= 0x8000000a)
>> + c->x86_capability[FEATURESET_ead] = cpuid_edx(0x8000000a);
>> if (c->extended_cpuid_level >= 0x80000021)
>> c->x86_capability[FEATURESET_e21a] = cpuid_eax(0x80000021);
>
> Aiui this is needed right in this change because of calculate_host_policy()
> deriving from boot_cpu_data.x86_capability. What I'd have expected in
> addition (going forward: instead) is an adjustment to
> x86_cpu_policy_fill_native().
I'm sorry, but no, there should be no need to adjust that function.
Jan
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